std::rank
From Cppreference
| Defined in header <type_traits>
| ||
| template< class T >
struct rank; | (since C++11) | |
If T is an array type, provides the member constant value equal to the number of dimensions of the array. For any other type, value is 0.
Contents |
Inherited from std::integral_constant
Member constants
| value [static] | the number of dimensions of T or zero (public static member constant) |
Member functions
| operator std::size_t | converts the object to std::size_t, returns value (public member function) |
Member types
| Type | Definition |
| value_type | std::size_t |
| type | std::integral_constant<std::size_t, value> |
[edit] Equivalent definition
template<class T> struct rank : std::integral_constant<std::size_t, 0> {}; template<class T> struct rank<T[]> : public std::integral_constant<std::size_t, rank<T>::value + 1> {}; template<class T, size_t N> struct rank<T[N]> : public std::integral_constant<std::size_t, rank<T>::value + 1> {}; |
[edit] Example
Output:
3 4 0
[edit] See also
| (C++11) | checks if a type is an array type (class template) |
| (C++11) | obtains the size of an array type along a specified dimension (class template) |
| (C++11) | removes one extent from the given array type (class template) |
| (C++11) | removes all extents from the given array type (class template) |
